package com.media.module.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.Calendar;

import com.media.module.interfaces.MediaRecordFuncStater;

import android.media.AudioRecord;

public class AudioRecordFunc {
	// 缓冲区字节大小
	private int bufferSizeInBytes = 0;

	// AudioName裸音频数据文件 ，麦克风
	private String mAudioName = "";

	// NewAudioName可播放的音频文件

	private AudioRecord audioRecord;
	private boolean isRecord = false;// 设置正在录制的状态

	private static AudioRecordFunc mInstance;

	private MediaRecordFuncStater mediaRecordFuncStater;

	public void setMediaRecordFuncStater(MediaRecordFuncStater mediaRecordFuncStater) {
		this.mediaRecordFuncStater = mediaRecordFuncStater;
	}

	/**
	 * 获取AudioRecoder 对象
	 * 
	 * @return the audioRecord
	 */
	public AudioRecord getAudioRecord() {
		return audioRecord;
	}

	/**
	 * 获取缓冲区大小
	 * 
	 * @return the bufferSizeInBytes
	 */
	public int getBufferSizeInBytes() {
		return bufferSizeInBytes;
	}
	

	/**
	 * 获取数据源文件
	 * @return the mAudioName
	 */
	public String getmAudioName() {
		return mAudioName;
	}

	private AudioRecordFunc() {
	}

	public synchronized static AudioRecordFunc getInstance() {
		if (mInstance == null)
			mInstance = new AudioRecordFunc();
		return mInstance;
	}

	public int startRecordAndFile(String path, boolean isStart) {
		// 判断是否有外部存储设备sdcard
		if (AudioFileFunc.isSdcardExit()) {
			if (isRecord) {
				return ErrorCode.E_STATE_RECODING;
			} else {
				if (audioRecord == null)
					creatAudioRecord();

				audioRecord.startRecording();

				// 让录制状态为true
				isRecord = true;
				// 开启音频文件写入线程
				if (isStart) {
					File file = new File(mAudioName);
					if (file.exists()) {
						file.delete();
					}
				}
//				new Thread(new AudioRecordThread()).start();
				mediaRecordFuncStater.onMediaRecordFuncStart(Calendar.getInstance().getTimeInMillis());

				return ErrorCode.SUCCESS;
			}

		} else {
			return ErrorCode.E_NOSDCARD;
		}

	}

	public void stopRecordAndFile() {
		close();
	}

	private void close() {

		if (audioRecord != null) {
			System.out.println("stopRecord");
			isRecord = false; // 停止文件写入
			audioRecord.stop();
			audioRecord.release();// 释放资源
			audioRecord = null;
			mediaRecordFuncStater.onMediaRecordFuncStop(Calendar.getInstance().getTimeInMillis());
		}
	}

	private void creatAudioRecord() {
		// 获取音频文件路径
		mAudioName = AudioFileFunc.getRawFilePath();

		// 获得缓冲区字节大小
		bufferSizeInBytes = AudioRecord.getMinBufferSize(AudioFileFunc.AUDIO_SAMPLE_RATE, AudioFileFunc.AUDIO_CHANNEL,
				AudioFileFunc.AUDIO_PCMBIT_FORMAT);

		// 创建AudioRecord对象
		audioRecord = new AudioRecord(AudioFileFunc.AUDIO_INPUT, AudioFileFunc.AUDIO_SAMPLE_RATE,
				AudioFileFunc.AUDIO_CHANNEL, AudioFileFunc.AUDIO_PCMBIT_FORMAT, bufferSizeInBytes);
	}

	class AudioRecordThread implements Runnable {

		@Override
		public void run() {
			writeDateTOFile();// 往文件中写入裸数据
		}
	}

	/**
	 * 这里将数据写入文件，但是并不能播放，因为AudioRecord获得的音频是原始的裸音频，
	 * 如果需要播放就必须加入一些格式或者编码的头信息。但是这样的好处就是你可以对音频的 裸数据进行处理，比如你要做一个爱说话的TOM
	 * 猫在这里就进行音频的处理，然后重新封装 所以说这样得到的音频比较容易做一些音频的处理。
	 */
	private void writeDateTOFile() {
		// new一个byte数组用来存一些字节数据，大小为缓冲区大小
		byte[] audiodata = new byte[bufferSizeInBytes];
		RandomAccessFile randomAccessFile = null;
		int readsize = 0;
		try {
			File file = new File(mAudioName);
			randomAccessFile = new RandomAccessFile(file, "rw");

			while (isRecord == true) {
				readsize = audioRecord.read(audiodata, 0, bufferSizeInBytes);
				if (AudioRecord.ERROR_INVALID_OPERATION != readsize && randomAccessFile != null) {
					try {
						randomAccessFile.seek(randomAccessFile.length());
						randomAccessFile.write(audiodata, 0, bufferSizeInBytes);
					} catch (IOException e) {
						e.printStackTrace();
					}
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			if(randomAccessFile != null){
				try {
					randomAccessFile.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}

	// 这里得到可播放的音频文件
	public void copyWaveFile(String inFilename, String outFilename) {
		FileInputStream in = null;
		FileOutputStream out = null;
		long totalAudioLen = 0;
		long totalDataLen = totalAudioLen + 36;
		long longSampleRate = AudioFileFunc.AUDIO_SAMPLE_RATE;
		int channels = 2;
		long byteRate = 16 * AudioFileFunc.AUDIO_SAMPLE_RATE * channels / 8;
		byte[] data = new byte[bufferSizeInBytes];
		try {
			in = new FileInputStream(inFilename);
			out = new FileOutputStream(outFilename);
			totalAudioLen = in.getChannel().size();
			totalDataLen = totalAudioLen + 36;
			WriteWaveFileHeader(out, totalAudioLen, totalDataLen, longSampleRate, channels, byteRate);
			while (in.read(data) != -1) {
				out.write(data);
			}
			in.close();
			out.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 这里提供一个头信息。插入这些信息就可以得到可以播放的文件。 为我为啥插入这44个字节，这个还真没深入研究，不过你随便打开一个wav
	 * 音频的文件，可以发现前面的头文件可以说基本一样哦。每种格式的文件都有 自己特有的头文件。
	 */
	private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen, long totalDataLen, long longSampleRate,
			int channels, long byteRate) throws IOException {
		byte[] header = new byte[44];
		header[0] = 'R'; // RIFF/WAVE header
		header[1] = 'I';
		header[2] = 'F';
		header[3] = 'F';
		header[4] = (byte) (totalDataLen & 0xff);
		header[5] = (byte) ((totalDataLen >> 8) & 0xff);
		header[6] = (byte) ((totalDataLen >> 16) & 0xff);
		header[7] = (byte) ((totalDataLen >> 24) & 0xff);
		header[8] = 'W';
		header[9] = 'A';
		header[10] = 'V';
		header[11] = 'E';
		header[12] = 'f'; // 'fmt ' chunk
		header[13] = 'm';
		header[14] = 't';
		header[15] = ' ';
		header[16] = 16; // 4 bytes: size of 'fmt ' chunk
		header[17] = 0;
		header[18] = 0;
		header[19] = 0;
		header[20] = 1; // format = 1
		header[21] = 0;
		header[22] = (byte) channels;
		header[23] = 0;
		header[24] = (byte) (longSampleRate & 0xff);
		header[25] = (byte) ((longSampleRate >> 8) & 0xff);
		header[26] = (byte) ((longSampleRate >> 16) & 0xff);
		header[27] = (byte) ((longSampleRate >> 24) & 0xff);
		header[28] = (byte) (byteRate & 0xff);
		header[29] = (byte) ((byteRate >> 8) & 0xff);
		header[30] = (byte) ((byteRate >> 16) & 0xff);
		header[31] = (byte) ((byteRate >> 24) & 0xff);
		header[32] = (byte) (2 * 16 / 8); // block align
		header[33] = 0;
		header[34] = 16; // bits per sample
		header[35] = 0;
		header[36] = 'd';
		header[37] = 'a';
		header[38] = 't';
		header[39] = 'a';
		header[40] = (byte) (totalAudioLen & 0xff);
		header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
		header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
		header[43] = (byte) ((totalAudioLen >> 24) & 0xff);
		out.write(header, 0, 44);
	}
}